[wp-trac] [WordPress Trac] #38632: Ability to change a user language back to site's language is missing

[WordPress Trac]

#38632: Ability to change a user language back to site's language is missing
----------------------------+-------------------------
 Reporter:  ocean90         |      Owner:
     Type:  defect (bug)    |     Status:  new
 Priority:  normal          |  Milestone:  4.7
Component:  I18N            |    Version:  trunk
 Severity:  normal          |   Keywords:  2nd-opinion
  Focuses:  administration  |
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 Previously: #29783 and [https://wordpress.slack.com/archives/core-
 restapi/p1478116084000281 related discussion on Slack]

 In the admin (and via REST API #38528) it's currently not possible to set
 a user language back to site's language. `get_user_locale()` falls back to
 `get_locale()` only if the meta field is a falsy value.

 `wp_dropdown_languages()` uses an empty string value for `en_US` which
 gets replaced with `en_US` in
 https://core.trac.wordpress.org/browser/trunk/src/wp-
 admin/includes/user.php?rev=38705&marks=99-106#L99.

 I'm not sure if there really needs to be a way for this so I'm moving this
 to 4.7 for a decision.

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Ticket URL: <https://core.trac.wordpress.org/ticket/38632>
WordPress Trac <https://core.trac.wordpress.org/>
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